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digitalmaxMG

New member
Dec 18, 2020
2
0
Hello everyone,
i yesterday i bought secondhand Asus Zenphone 7 PRO stucked at CSC Fastboot MODE
When i turn on the phone it pops android icon for 1 sec then it goes automatically to CSC FastBoot Mode, then you can choose between START, Restart bootloader, Recovery mode, and Power OFF.
When you choose one of them they restart phone and again 1 sec android icon (sometimes charging icon also ) and then CSC fastboot mode .,
On PC the device can be recognise like ASUS BOATLOADER , after installing drivers it shows like Android ADB device.
Tried with platform-tools_r30.0.4-windows , on adb devices it now shows up , but when i type fasboot device it shows the serial number of my phone, and i can restart it with /fastboot reboot.
Thats all i tried stuck at this point.

Greetings
 

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Joeb2000

Member
Feb 23, 2009
29
6
ASUS ZenFone 7/7 Pro
The only way to fix this is flash a full stock image.

This happened to me while trying to root. After unlocking, installing twrp, and following the rest of the directions kept booting back into twrp. After messing around with it a few more times it gave me an error that the system was corrupt and would not allow booting into anything other than crc fastboot. I was crapping my pants at the thought that I just bricked my new phone. But after a little more research I found the asus flashing tool and full image.

This is the specific link I got the flashing tool from. I see there are other versions if I do a google search. But I used this one and know it worked fine.

Then I grabbed this zip file, and the latest firmware from asus website. I saw the firmware from Asus was almost half the size so I was unsure what it may have been missing. Which is why I flashed the larger file from Mega first.

Also, the flashing tool gives an error about missing a frp account, you don't have to worry about that. The flashing tool likes to be started before the phone is connected as well. So if you start it and it doesn't see the phone, disconnect and reconnect and it should pop up.

Then just pick the first zip file in the tool and hit start. It took almost 10 minutes to fully write everything for me. plugged into a usb 3 port. When it is done restart it and it should be like a factory phone again. After setting it up, I copied the smaller zip i grabbed from asus to update it onto the sdcard. As soon as it was done copying the system automatically saw the zip as an update and asked if I wanted to install it.
 
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articoceanic

Senior Member
Jan 16, 2010
62
1
The only way to fix this is flash a full stock image.

This happened to me while trying to root. After unlocking, installing twrp, and following the rest of the directions kept booting back into twrp. After messing around with it a few more times it gave me an error that the system was corrupt and would not allow booting into anything other than crc fastboot. I was crapping my pants at the thought that I just bricked my new phone. But after a little more research I found the asus flashing tool and full image.

This is the specific link I got the flashing tool from. I see there are other versions if I do a google search. But I used this one and know it worked fine.

Then I grabbed this zip file, and the latest firmware from asus website. I saw the firmware from Asus was almost half the size so I was unsure what it may have been missing. Which is why I flashed the larger file from Mega first.

Also, the flashing tool gives an error about missing a frp account, you don't have to worry about that. The flashing tool likes to be started before the phone is connected as well. So if you start it and it doesn't see the phone, disconnect and reconnect and it should pop up.

Then just pick the first zip file in the tool and hit start. It took almost 10 minutes to fully write everything for me. plugged into a usb 3 port. When it is done restart it and it should be like a factory phone again. After setting it up, I copied the smaller zip i grabbed from asus to update it onto the sdcard. As soon as it was done copying the system automatically saw the zip as an update and asked if I wanted to install it.
hello friend

you seemt to be knowledgable, do you know how i can root my zenfone 7, have you managed to root yours or get twrp installed?
 

Joeb2000

Member
Feb 23, 2009
29
6
ASUS ZenFone 7/7 Pro
hello friend

you seemt to be knowledgable, do you know how i can root my zenfone 7, have you managed to root yours or get twrp installed?

I was able to root mine, but the method with TWRP kept giving me a bootloop so I had to use a different way.

I used the "Method 2" listed here.

Just make sure you pay attention to the pre-req's both the main and the method 2 specific ones.

Then it will basically go like this (assuming you already unlocked your bootloader and have adb and usb drivers already installed).

Grab latest firmware from Asus.

Copy the firmware zip to your phone storage and let it update. usually after you copy the zip and unplug your phone the system sees the update and asks if you want to apply it.

Download and install Python.

Grab payload dumper I attached to this post and extract the contents to your Python install directory.

Open the firmware zip and pull out the "payload.bin" file and put it in your python directory.

Open a command window in the python directory and run these 2 commands.
python -m pip install protobuf
python payload_dumper.py payload.bin

While that is extracting, download the latest Magisk apk, then copy it to your phone and install it.

In your python directory there should be a new folder called "output" look and see if the "boot.img" is done extracting. its the only thing you really need from it. Copy that boot.img file your phone storage (SD card preferrable if you have one).

Open Magisk manager on your phone, click "install" next to Magisk. It will ask for the method, choose to patch a file. Then select the boot.img file you copied.

After it is done look in your phones download folder for a "Magisk_Patched.img", copy that file to your adb folder.

Reboot your phone into fastboot mode.

Open command window in your adb folder. and run these commands
fastboot devices
fastboot flash boot magisk_patched.img

The first one should list your phone, if it does not, you don't have it in fastboot mode. I had that problem at first, I had it in recovery instead of fastboot.

After it is done flashing, reboot your phone with
fastboot reboot

Then you should be ready to go, although I had to go back in the manager and install Magisk a second time myself. Plus I had to use the manager to install the "Magisk hide" module and hide it from a few apps. Things like google pay don't like to work if it detects root. But hiding it from that app works great.
 

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23598685

Member
May 23, 2014
23
1
I am having the same problem. The AFT_Asus tool from above doesnt seem to work any more, saying too old on installation.
What I have found is Asus_Zenfonr_FlashTool_v2.0.1, which installs ok.
After starting the app and connecting the fone, I get disconnected and a warning that battery is at -1%, which is not true, its fully charged. There is nothing more I can do, Browse asks to connect the fone, hitting yes shows the same screen again.
Did somebody else run into this problem or has a working Asus flash tool?
aft.png
 
Last edited:

Joeb2000

Member
Feb 23, 2009
29
6
ASUS ZenFone 7/7 Pro
I am having the same problem. The AFT_Asus tool from above doesnt seem to work any more, saying too old on installation.
What I have found is Asus_Zenfonr_FlashTool_v2.0.1, which installs ok.
After starting the app and connecting the fone, I get disconnected and a warning that battery is at -1%, which is not true, its fully charged. There is nothing more I can do, Browse asks to connect the fone, hitting yes shows the same screen again.
Did somebody else run into this problem or has a working Asus flash tool?
View attachment 5379741

Same issue please help


You did correct getting the new version, but you also need an updated driver.
I found one that works. The phone still says it is 0%, but it let me connect it this time and after selecting the image lit up the start button. I didn't want to completely wipe my phone at the time and try to redo everything so I did not hit start, but at least you can install the new drivers and give it a try yourself.

I got them from here.


For some reason they don't even list the zenfone 7. it goes from 6 to 8.

But you can select the windows 8.1 64bit drivers (or x86 if you are running a 32bit system). Download and install those. It may have you reboot after, please do it.

Just in case you do not know how to install these kind of drivers. Simply extract the zip, then inside go into the "windows_xp_vista_7_8_8.1" folder, then into the "android" folder, and there will be a file called "android_winusb.inf" unless you have file extensions hidden, then it won't have the .inf on the end. But simply right click on it and it should say "install" as the second option on your right click menu. Just click on install and it should only take a couple seconds.
 
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23598685

Member
May 23, 2014
23
1
The only way to fix this is flash a full stock image.
snip
Then I grabbed this zip file, and the latest firmware from asus website.
Man thank you very much for your help. I was able to recover the device using the zip file.
I was never able to get the flash tool working, the device did not connect. Even with the latest USB drivers.
How I got is working is download and unzipped the zip file from above, connected using fastboot , then ran dl_multiple_update_image.sh.
I am on Linux and had to buy a Windows 10 notebook just for this crappy flash tool, looks like this was not needed. If anybody is on Windows, there is a dl_multiple_update_image.bat file included in the Zip file.
 

IronSingh

Senior Member
Nov 2, 2010
377
79
Kuwait
Xiaomi Mi 11
Man thank you very much for your help. I was able to recover the device using the zip file.
I was never able to get the flash tool working, the device did not connect. Even with the latest USB drivers.
How I got is working is download and unzipped the zip file from above, connected using fastboot , then ran dl_multiple_update_image.sh.
I am on Linux and had to buy a Windows 10 notebook just for this crappy flash tool, looks like this was not needed. If anybody is on Windows, there is a dl_multiple_update_image.bat file included in the Zip file.
Um virtual box?

and this is latest

you can also fastboot to recover
 

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  • 1
    The only way to fix this is flash a full stock image.

    This happened to me while trying to root. After unlocking, installing twrp, and following the rest of the directions kept booting back into twrp. After messing around with it a few more times it gave me an error that the system was corrupt and would not allow booting into anything other than crc fastboot. I was crapping my pants at the thought that I just bricked my new phone. But after a little more research I found the asus flashing tool and full image.

    This is the specific link I got the flashing tool from. I see there are other versions if I do a google search. But I used this one and know it worked fine.

    Then I grabbed this zip file, and the latest firmware from asus website. I saw the firmware from Asus was almost half the size so I was unsure what it may have been missing. Which is why I flashed the larger file from Mega first.

    Also, the flashing tool gives an error about missing a frp account, you don't have to worry about that. The flashing tool likes to be started before the phone is connected as well. So if you start it and it doesn't see the phone, disconnect and reconnect and it should pop up.

    Then just pick the first zip file in the tool and hit start. It took almost 10 minutes to fully write everything for me. plugged into a usb 3 port. When it is done restart it and it should be like a factory phone again. After setting it up, I copied the smaller zip i grabbed from asus to update it onto the sdcard. As soon as it was done copying the system automatically saw the zip as an update and asked if I wanted to install it.
    1
    I am having the same problem. The AFT_Asus tool from above doesnt seem to work any more, saying too old on installation.
    What I have found is Asus_Zenfonr_FlashTool_v2.0.1, which installs ok.
    After starting the app and connecting the fone, I get disconnected and a warning that battery is at -1%, which is not true, its fully charged. There is nothing more I can do, Browse asks to connect the fone, hitting yes shows the same screen again.
    Did somebody else run into this problem or has a working Asus flash tool?
    View attachment 5379741

    Same issue please help


    You did correct getting the new version, but you also need an updated driver.
    I found one that works. The phone still says it is 0%, but it let me connect it this time and after selecting the image lit up the start button. I didn't want to completely wipe my phone at the time and try to redo everything so I did not hit start, but at least you can install the new drivers and give it a try yourself.

    I got them from here.


    For some reason they don't even list the zenfone 7. it goes from 6 to 8.

    But you can select the windows 8.1 64bit drivers (or x86 if you are running a 32bit system). Download and install those. It may have you reboot after, please do it.

    Just in case you do not know how to install these kind of drivers. Simply extract the zip, then inside go into the "windows_xp_vista_7_8_8.1" folder, then into the "android" folder, and there will be a file called "android_winusb.inf" unless you have file extensions hidden, then it won't have the .inf on the end. But simply right click on it and it should say "install" as the second option on your right click menu. Just click on install and it should only take a couple seconds.